Prediction of compressive strength of carbon-epoxy laminates containing delamination by using a mixed-mode damage model

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Marcelo F. S. F. de Moura (Author) FEUP; J. P. M. Gonçalves (Author) Other; António Torres Marques (Author) FEUP; Paulo Tavares de Castro (Author) FEUP

Journal

Title: Composite Structures

Vol. 50 No. 2

Pages: 151-157

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 46 Citations

Scopus - 58 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-000-YT1

DOI: 10.1016/s0263-8223(00)00091-x

Abstract (EN): It is well known that composite laminates are easily damaged by low-velocity impact. The internal delaminations can drastically reduce the compressive strength of laminates. In this study, a numerical analysis for predicting the residual compressive strength of delaminated plates is proposed. The delaminated interfaces are modelled by using interface elements connecting the three-dimensional solid elements modelling the composite layers. Delamination propagation is modelled by using a damage model based on the indirect use of fracture mechanics. Due to the complex stress state of the problem, a mixed-mode analysis including the three modes of fracture was considered. Experimental studies were performed on carbon-epoxy [0(4), 90(4)](s) and [90(4), 0(4)](s) laminates. They included low-velocity impact tests, followed by X-ray damage characterisation and compression tests. Good agreement between experimental and numerical analysis was obtained.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7